Update plugin org.jetbrains.kotlin.multiplatform to v2.2.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.jetbrains.kotlin.multiplatform	2.2.0 -> 2.2.21

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Configuration

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.29%. Comparing base (7e2809a) to head (def8925).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #2121   +/-   ##
=========================================
  Coverage     91.29%   91.29%           
  Complexity      125      125           
=========================================
  Files           468      468           
  Lines          4777     4777           
  Branches        242      242           
=========================================
  Hits           4361     4361           
  Misses          366      366           
  Partials         50       50           

Flag	Coverage Δ
current	90.91% <ø> (ø)
current_windows	90.01% <ø> (ø)

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[renovate]

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